Valve-gear.



PATENTED DEC. 18, 1906.

G. A. ANDERSON.

VALVE GEAR.

APPLIOATION FILED AUG. 18. 1906.

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UNITED STATES PATIENT @FFIQF.

GUSTAF ARVID ANDERSON, OF WAYNESBORO, PENNSYLVANIA, ASSIGNOR TO THEGEISER MANUFACTURING COMPANY, OF VVAYNESBORO, PENN SYLVANIA.

VALVE-GEAR.

Specification of Letters Patent.

Patented Dec. 18, 1906.

Application filed August 18,1906- Serial No 331,173-

To all whom, it may concern:

Be it known that I, GUsrAF ARVID ANDER- SON, a citizen of the UnitedStates, residing at IVaynesboro, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements inValve- Gear; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to valve-gear for steam-engines; and it consistsin the novel construction and combination of the parts hereinafter fullydescribed and claimed.

In the drawings, Figure 1 is a plan, view of a double engine providedwith valve-gear according to this invention. Fig. 2 is a side viewshowing the crank-shaft in cross-section. Fig. 3 is a plan view showingthe eccentric provided with two straps. Fig. 4 is a side view of theparts shown in Fig. 3.

This invention pertains more particularly to the double engines used fordriving large traction-engines. Such engines re uire to be reversed, andon account of the sma 1 space in which it is desirable to have them workthe valve-gear is made as simple and with as few separate parts aspossible.

A is the engine-bed, provided with crankshaft bearings a. B and C arethe two cylinders of the double engine secured to the said bed.

D is the crankshaft provided with cranks B and C. A connecting-rod 11connects the crank B with the piston-rod of cylinder B, and aconnecting-rod c connects the crank O with the piston-rod of cylinder 0.The two cranks are arranged at a right angle to each other.

E is a single eccentric which is operatively connected with thecrank-shaft D in any approved manner. This eccentric is reversed bysliding it across the center of the shaft in the usual manner, and forthis purpose it is provided with a slot or opening. Any approvedconstruction of reversing-gear may be provided for sliding the eccentricacross the shaft.

F is a driving-plate secured to the crankshaft, andf is a bolt or screwfor securing the eccentric E to the driving-plate in any desiredposition or positions. This drivingplate'is illustrated to show aworking connection between the eccentric and the crank-shaft which mightbe used in some cases; but it is preferred to use one of the approvedforms of reversing-gear which will permit of the eccentric being slidback and forth quickly, so that the engine may be reversed at any momentand without delay.

G is a single eccentric-strap mounted on the eccentric E. Thiseccentric-strap is provided with two eccentric-rods H and I. Theeccentric-rod H is formed integral with or is rigidly secured to thestrap, and the eccentricrod I is connected to the strap by a pin 'i.

- The two eccentric-rods are arranged at a right angle with each otherwhen the center 2 of the eccentric and the other parts are all in thepositions shown in Fig. 2.

J is a rocker-arm or bell-crank lever pivoted to the bed by a pin Theupper end of this arm or lever is pivoted to the eccentricrod H by a pin3'. and its lower end is pivotally connected with the valve-stem n ofthe valve which distributes the steam to the cylinder B.

K is an arm secured upon a rock-shaft 7c, which is journaled in bracketsK, secured to the bed. The arm K is pivoted by a pin 7c to theeccentric-rod I. I is also an arm secured to the said rock-shaft at asuitable angle to the arm K, so as to form a kind of bellcrank lever.The arm P is pivotally connected with the valve-stem p, which pertainsto the steam-distributing valve of the cylinder 0, by a pin 10.

When the two eccentric-rods are set at an angle of ninety degrees witheach other, the same as the two cranks, and when the parts are allarranged as shown in the drawings, it is found that a suitable motioncan be obtained for the two steam slide-valves and that both valves canbe operated by a single eccentric. A double engine constructed in thismanner can be run continuously in one direction or the other and can bereversed as often as required.

If desired, two eccentric-straps G G may be used, as shown in Figs. 3and 4, instead of a single strap, as shown in Figs. 1 and 2. When twoeccentric-straps are used, each eccentric-rod may be formed integralwith or rigidly secured to the strap to which it pertains, and it is notnecessary for one of the eccentric-rods to be pivoted to its strap.

Whatil claim is- 1. The-combination, with an engine provided with acrank-shaft, two cylinders arranged side by side and operativelyconnected with the said crank-shaft, and two valve-spindles for thesaid. cylinders also arranged side by side; of two bell-crank leversfulcrumed on opposite sides of the said valvespindles and having theiradjacent ends pivoted to them respestively, and two eccentricroidsdriven. from the said crank-shaft and pivoted to the outer ends of thetwo said belLcrank levers respectively.

p 2. "The combination, with an engine provided with a crank-shaft, twocylinders arranged side by side and operatively connected with the saidcrank-shaft, and two valve-spindles for the said cylinders also arrangedside by side; of two bell-crank levers fulcruined on opposite sides ofthe said valvespindles and having their adjacent ends pivoted to themrespectively, a single eccentric driven by the said crank-shaft andprovided with an eccentric-strap, an eccentric-rod rigidly connected tothe said strap and Ipivoted

